I'm trying to merge several VCF files, each with inserts from a different individual. There are inserts that appear in only one individual, yet other individuals have inserts very close by (with a difference of a few nucleotides). I suspect that these inserts are the same. Is there a way of merging these VCF files, and consider variants located within a set distance (e.g. 100 nucleotides) to be the same variant?